I82.499 Acute embolism and thrombosis of other specified deep vein of unspecified lower extremity

The ICD-10-CM code for Acute embolism and thrombosis of other specified deep vein of unspecified lower extremity is I82.499 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

9: Diseases of the circulatory system (I00-I99)

Section

I80-I89: Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)

Category I82

193 codes (145 billable)

FY2026 Status

Stable since FY2024

U.S. Hospital Utilization

• An estimated 105 U.S. inpatient stays in 2021 included I82.499 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Presumed relationship due to Index term “with”

The classification presumes a causal relationship between hypertension and heart involvement and between hypertension and kidney involvement, as the two conditions are linked by the term “with” in the Alphabetic Index. These conditions should be coded as related even in the absence of provider documentation explicitly linking them, unless the documentation clearly states the conditions are unrelated.

Provider must link conditions not specifically indexed as related

For hypertension and conditions not specifically linked by relational terms such as “with,” “associated with” or “due to” in the classification, provider documentation must link the conditions in order to code them as related.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

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I82.499 — Acute embolism and thrombosis of other specified deep vein of unspecified lower extremity. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/I82.499

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